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denpristay [2]
4 years ago
11

Researcher Jessie is studying how the fear of going to the dentist affects the actual number of visits made to the dentist for a

dults. She asks a random sample of adults whether or not they fear going to the dentist and also how many times they have gone in the past 10 years. She would like to assess if the average number of visits made by adults who fear going to the dentist (Group 1) is lower than the average number of visits for those who don't have that fear (Group 2), that is, test H0: μ1 = μ2 versus Ha: μ1 < μ2, using a 10% significance level. Her random sample of adults resulted in 14 stating they feared going to the dentist and 31 stated they did not fear going to the dentist. The first sample mean was 1.71 pooled standard errors above the second sample mean.
She has asked you to provide a complete sketch of the p-value that she can include in her report. Calculate the degrees of freedom and test-statistic value.
Mathematics
1 answer:
Stolb23 [73]4 years ago
3 0

Answer:??????????????????????????????

efjgfiufsonrngStep-by-step explanation:

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Mister Lincoln by juices and water for the school picnic a pack of their juices box cost $5 about the six water bottles cost $3
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Answer:

10 packs of juice and 15 packs of water was bought by Mr. Lincoln

Step-by-step explanation:

Mr. Lincoln buys juice and water for the school picnic. A pack of 8 juice boxes costs $5. A pack of 6 water bottles costs $3. Mr. Lincoln spends $95 for 170 juice boxes and bottles of water.

Solution:

Let x represent the number of packs of juice boxes bought by Mr. Lincoln and let y represent the number of packs of water bottles bought by Mr. Lincoln.

Each pack of juice cost $5 while each pack of water cost $3. Mr. Lincoln spends $95, therefore:

5x + 3y = 95       (1)

Each pack of juice contain 8 juice boxes and each pack of water contain 6 water bottles. Since 170 juice boxes and bottles of water was bought, therefore:

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Solving equations (1) and (2) simultaneously. Multiply equation (1) by 2 and then subtract equation (2) from the result to get:

2x = 20

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Substitute x = 10 in equation (1):

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